It's not that I can't afford to buy good polar electrolytics, just that I had these lying around and I figure that if they're good enough quality for signal path, that they might be great in a power supply.

Continuing on the same tangent, I recently came across a metallised polyster film capacitor series that is in standard production which goes as high as 470uF @ 63V. They're certainly wouldn't be cheap, and they're obviously quite chunky, but I guess they would definitely represent and interesting alternative to electrolytics....
And you'd only need 21 of them in parallel to form a 10,000uF @ 63V PSU cap !!!!